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Summary of IPSG Configuration Tasks

Summary of IPSG Configuration Tasks

Table 12-6 lists IPSG configuration tasks. The tasks are independent of each other. You can select one task or a combination of tasks according to service requirements.

Table 12-6 IPSG configuration tasks

Task

Description

Reference

Configure IPSG based on a static binding table.

If a LAN has a small number of hosts and the hosts use static IP addresses, you can configure IPSG based on a static binding table. Then, IPSG can filter the IP packets received by untrusted interfaces, and effectively prevent malicious hosts
from stealing authorized hosts' IP addresses to access the network without permission.

If a LAN has a large number of hosts or the hosts obtain IP addresses through DHCP, you can configure IPSG based on a dynamic binding table. Then, IPSG can filter the IP packets received by untrusted interfaces, and effectively prevent malicious
hosts from stealing authorized hosts' IP addresses to access the network without permission.

Configure the switch to generate snooping MAC entries based on the binding table.

IPSG based on a static or dynamic binding table can prevent hosts with unauthorized MAC addresses from accessing the network. However, the switch may learn or update MAC entries incorrectly, causing MAC address flapping.

After this task
is performed on an interface, the interface does not learn MAC entries, and the switch generates snooping MAC entries based on the binding table.

IP packets with identical source and destination IP addresses may be attack packets (for example, if the traffic volume is high, a LAND attack may be occurring). After confirming that such packets are attack packets, perform this task to discard
them.